Improvement in furnace-stoves



JAMESV o'Ln, orv Pirrsnu'c, PENNSYLVANIA.

Letters Patent No. 110,274, dated December 20, 1870.

IMPROVEMENT IN FURNACE-STOVES.

The Schedule referred to in than Letten Patent and making part of thesaine.

To all whom it may concern:

Be it known that l', JAMES OLD, of the city of Pittsburg, in the countyof Allegheny and State of Bennsylvania, have invented a new and useful Improvcmentin Stoves; and I do hereby declare the following to be a full,clear, and exactdescription thereof', reference being had to theaccompanying drawing, in two sheets, in whicl1 Figure 1 is a perspectiveview of my improved furnace-stove;

Figure 2 is a sectional view thereof;

Figure 3, (sheet 2,) a front view oi' the same, with conical top;

Figure 4 is a sectional view of the stove-top of fig. 3;

Figure 5 is a side view of thc rotating grate-ring;

Figure 6 is a perspective view of the ash-pit;

. Figure 7 isalike-viewfof-ash-pit,rotating-ling, and circular grate;and

Figure 8(sheet 1) is a pian view of the ring and grate. Like letters ofreference indicate like parts in each.

g My-invention'rclates to improvements in upright cylindrical andegg-shaped stoves, and stoves having the form of an inverted cone,commonly known as furnacestoves; and consists in an improvedconstructiouot` grating, and an improved arrangement of fire-pot, air,-

ues, and reverberating cover.

To enable others skilled in the art to make and use my improvement, Iwill proceed to describe its con# struction'and mode of operation.

Idn iigs. 1 and 2, b is the casing or shell of the stove, un Ala' thetop-plate.

Inside the shell is a fire-pot, f, made of fire-clay or other suitablematerial, and ol' any desired form, the upper open cud of which comesq'uite neahto the topplate b', leaving suiicient room, however, for thesmoke,

' gases, 8tc., from the fire to pass over the upper edge of the fire-potf; along the upper part o f the chamber g', and escape at the smoke-holeb". ,p

Through an arrangement-of dampers, presently to be d escribed, air issupplied, when desired, by grooves or air-passages g, lig. 2, which pass11p-between the tire-pot f and the shell b, and supply air, through thechamber g', to the fire at the upper edge ofthe lirepot, the better toeilect the combustion ofthe othervwise unconsnmed carbon.

- The ykettle-rnboiler containing whatever is to be heated is placed inthe' stove-hole shown in iig. 1,.so that its lower end shall como insideor directly over the .re4pot` f, the edges of which come well up aroundthe kettle, andbring the heat and aiiamc in contact therewith before thelatter can escape through the pipe hole b'. In iig. 3 I have shown asimilar arrangement of tirepot f and lower s hell b, applied te anegghapcd stove,

in which d represents the upper conical part of the shell, and d thepoint of exit for the smoke.

In such stoves, that is, upright shell-stoves, of cggshape, cylindricnl, or other like form, I introduce a reverberatory tile, h,directly ovcrtlie lire-potj'; in a. horizontal position, suspend it onthe inwardly-projecting lugs z ot' the shell d, but so as to leave asmoke-tine, It', extcndin g all around between the edge of the tile hand the shell d, except where the lugs e' are arranged.' The effect osuoli a tile so arranged iu promoting the combustion of smoke and gases,and preventing the rapid escape and-waste of heat, is already well knowninthe art. It also has the effect to throw the inside heatl against theshell of the stove, and so increase the outside radiation of heat fromthe. tove.

In the bottom part of the stove a represents a c linof a diameter aboutequal to or a little in excess of the diameter ofthe circulargrate,.preseutiyto be described.

0n the inside ofthe ash-box a are cast a series of incliues, a', (lig.6,) three or more in number.

Immediately inside the ash-box a au annular ring, c, (Iig. 5,) isarranged by means of lugs c' c", one, c', of each set operating ou theupper part of one of the inclines a', andthe other, c, on the lowerface, so as to hold such ring securely in position,A as il; goes up anddown, uuderthe eil'cct of a rotary motion imparted to it, as

`presently to bc described.

lThe upper face or end of this ring c' constitutes a part of thegrating, as shown in iigs. 7 and 8, ,and when rotated its lugs c c,acting ou the inclines a', cause it to act, in stirring, agitatirig, orshaking up the lire, by a compound rotary and vertical motion. This ringc I arrange so that it shall operate at or near the face vof thefirepot, so as to stir the fire at that part ofthe {irechamber, preventthe coking ofthe coal on the inside lYacc ofthe tire-pot, and promotethe combustion thereotat the outer edge ofthe re. This is au importantfeature of my improvement, since it secures the most rapid combustionnext the shell of the stove, where theheat developed is mosteconomically applied, the fuel at the center of the {irc-chamber beingdisturbed but little, if at all.

This agitating-ring is notched or recessed at two or more suitablepointsas at c, in' which notches the radial bars n' of the circulargrating n u' operate. This grating. n u' may be of any-desiredconstruction, provided only that it be capable of rotating, and be ofsuit-V able form or have suitable devices for engaging the ringA c andimparting to it a rotary motion.

The grating u n has a handle, m, by which it may receive the motiondcscribed,'or a removable handle may be inserted in the usual way. Then,as the grating n n' is caused to rotate intermittently and alternatelyin opposite directions, its radial bara n', engaging the ring c by itsnotches e, cause the ring to rotate by a like motion, and also move upand down, by means of its lugs cc operating on the inclines a'.

While claiming the devices described and their mechanical equivalentsfor imparting a vertical and rotary motion to the ring c, I also claimthe ring c, when so constructed and arranged as to operate iushaking'oragitating the re by a direct vertical motion, whether such directvertical motion be effected by a lever or other equivalent device, as Iam not aware of a prior construction or use of a vertically-movingannular ring as a part of a stove-grate.

The ring c may be cast in onel.piece or in sections, and such sectionsbe bolted together, or so connected with the agitating devices as tomove together in producing the eiects above described.- i,

The outer ring of the grating n n', which comes under the tire-pot f,has a series of air-passages, s s, which correspond in number andarrangement with the grooves g in the sides of the lire-pot f, and withair.- passages s s in the ring v, on which the re-pot rest's.

-Then, by shifting the lever m, the air-passages s s' and grooves g canbe made to correspond, so as to furnish a supply of air to the lire atthe upper mouth of the fire-pot f, ae above described, or such supplymay be cnt off at pleasure.

used in connection with open-front stove and fire-place grams; also,that such cover has been combined, in a Asheet-bron topped stove, with acontracting or tapering throat, which leads from the annularspace aroundthe cover to the center of the chamber above, as shown in patent tol A.J. Redway, dated 29th September, 1868.4 I hence disclaim sucharrangement, and limit myself in this part of my invention to thearrangement set forth in the last of the claims hereunto annexed.

lVh-at I claim as my invention, and desire to secure by Letters Patent,is

1. A rotating grating, vn n', the. outer ring of which has air-passages,s s,'in combination with air-passages 'leading .thenceto an annularchamber, g', between the lire-pot f and stove-shell 1), substantially asdescribed. 2. A ring, c, the upper end of which forms a part of thestove-grating, when combined'therewith so as to operate, byra directvert-ical or vertical and rotary motion, in agit-,ating the fire,substantially as set forth.

3. The ring c and ash-pit a, 'the one having an ar-A rangement of lugs,and the other a corresponding arrangement of inclines, for securinga'vertical and intermittent rotary motion of the ring, substantially asdescribed.

Witnesses:

A. S. N IcHoLson, G. H. CHRISTY.

